6%S/AR and 3%S/AR foam extinguishing agents are multi-functional fire extinguishing agents, which are made up of polymer bio glue, composite foaming agent and fluorocarbon surfactant as raw materials. It has good anti solubility and oil repellency. When the foam meets polar liquid, a polymer film is formed at the interface between the fuel and the foam, which effectively protects the foam. It is mainly used to extinguish the fire of polar liquids such as alcohols, ethers, aldehydes, esters, ketones, and also to extinguish fires of oil and solid substances.